Shock absorber



patented Wlan, 9,

irrita RUDDLPH C. G. STAATS-OELS, 0F BROKLYN, NEW YORK.

snocK insomma Application led July 11,

T 0 all 10720722 t may concern; i Y

Be 1t known that I, RUDOLPH C. Gr. Sfrna'rs- Onis, a citizen of theUnited States, resid-.

ing at Brooklyn, -county of Kings, and State of New York, have inventedcertain new and useful Improvements in Shock Absorhers, of which thefollowing is a specification.

rlhis invention relates generally to shockl absorbers for automobiles,the invention having more particular-reference to a shock absorberutilizing air compression'. e

T he invention has 'for an object the provi-` sion of a novel andimproved shock absorber of the piston and plunger type which operates byair compression, a furtherobjectof the invention relating to theincrease of general cushioning eiiect by the use of a plurality ofcylinders that telescopeone into the other.

For further comprehension' of the invention, and of the objects andVadvantages' thereof, reference will be had to the following descriptionand accompanying drawing, and to the appended claims in whichthe variousnovel features of the invention are more particularly yset forth.

Fig. 1 of the drawing is a central vertical sectional view of myimproved shock absorber.

Fig. 2 is a transverse sectional view thereof taken on the line 2-2 ofFig. l.

Referring now to the drawing, the reference numerals 10, 11 and 12designate three cylinders which are closed at the bottom by the bottommembers 10', 11 and 12 respectively. rEhese cylinders are open at theirupper ends, thetop cylinders 10 fitting intor and forming a plunger inthe intermediate cylinder 11, while the latter lits 'into the upper endof the lower cylinder 12 and forms a plunger in the latten Fittingslidably in i the top cylinder 10 is a plunger 14. This plunger 14 isformed on its upper end with an upwardly projecting ear 15, while thecylinder 12 has formed on the bottom thereof a downwardly projecting ear164 these ears 15 and 16 forming the medium of attachment of the deviceto the body and aXle of the automobile, Vand being here shown asprovided with apertures 17 to receive fastening pins or bolts. It willbe understood'of course that any suitable provision maybe made foratt-aching the plunger le and the cylinder 12 to the proper automobileparts. The plunger 14, and cylinders 10 and 1,1 have their upper halvesof diminished di- 1924. Serial y No. 725,411.

ameter, forming shoulders 2O that are adapt-l ed to be engaged by rings21,22 and 23 screwedinto the respective cylinders 10, 11, and 12 toprevent longitudinal displacelment of the various parts from oneanother. t

Fixed at its lower end to the bottom 12 of the lower cylinder 12 is atube 25 that extends upwardly through the bottomsof the other cylinders10 and 11. This tube is surrounded `by an exterior sleeve 26 which is ofapproximately the same length as the tube and which lits 'snugly in theapertures provided in the bottomsof the cylinders 110 and 1l. The tube25 andwsleeve 26 are formed with rows of registering apertures 27 and n28 that are placed throughout the length of said sleeve and tube, theseapertures constituting' ports through which air passes into and out ofthe cylinders 1O,11,and.12. At its upper end, the tube sleeve 26'fitsfrictionally in a bushing 29 -itted into the lower end, of alongitudinal passage 8O inthe plunger 114, this Ypassage accommodatingthe tube and sleeve when the parts move in a collapsing direction.Fixed` at its ends to the sleeve 26 is a pin 31 that passes throughshort lonapertures 28 and 27 in the sleeve and tube are 1n registry withone another'.

gitudinal slots 32 in the tube 25, the pin enn gagmg the upper ends ofthe slots when the In the operation of my improved shock.

absorber', assuming the parts to be in the relative positions shown inthe drawing, an initial downward movement of the plunger 14 will causethe sleeve 26 to move downward on the tube 25 until the pin 31 engagesthe lower endsfof the slots 32, the friction be1 tween the sleeve 26 andbushing 29 being greater than that between the tube 25 and the sleeve.The ports leading from the various cylinders are thus immediatelyclosed,rand further downward movement of the plunger, or of the uppercylinders 10, 11, will cause the air in the variouscylinders to becompressed. As soon as the recoil movement starts the sleeve 26 is movedupward to open the said ports,allowing the air to escape. By thismeans`- any recoil effect from the air is prevented-the deviceutilizing` only the cushioning edect thereof as the springs of theautomobile compress.

If desired I may vary the degree of air compression resulting in eachcylinder as the downward movement of the parts occurs, which may beeffected byslightly varying the positions of the openings in the lowerparts oi the sleeve so that the latter do not move entirely out ofregistry with the openings in the tube at any time.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent of the United `States is as follows:

l. A shock absorber including a cylinder,

a plunger operable to vary atmosphericpresi sure therein, a valve deviceincluding an apertured tube secured at oneendV 'toi saidl cylinder andicommunicating with the yatmosphere, and an apertuiied sleeve movablewith said plunger longitudinally of said tube to bring the'yapertures',` in the sleeve into and outr of registry with those in saidtube to open and shut oiii" comnmnicatio'n between said cylinder andthe; atmosphere.

2. A shock absorber including a cylinder, a plunger'operable to varyatmospheric piressure therein, and a valve device including a tube anda'sleeve each havingapertures, one

lthe plunger is moved in oneV directionV to bring the apertures in saidelements outl of registry tok close communication between said cylindersand the atmosphere.

4. A shock absorber for automobiles comprising a cylinder` a.. tubefixed at its lower end in the bottom of saidcylinder and communicatingwith the atmosphere, a plunger, a sleeve surrounding said tube, saidsleeve being' rictionally engaged with said plung er, and (3o-operatingmeans on said sleeve andtube arranged to permit of limited slidingmovement of the sleeve on the tube, said sleeve andtube having aperturestherein adapted to bemovedinto and out of registry by sliding movementof the sleeve on the tube.

5. A shock absorber for automobiles comprising a plurality of verticallydisposed cylinders itting; tele'scopieally intoY one another, aplunger'itting into theltop cylinder, a tube fixed at its lower end inthe bottom of thelow'er cylinder, a sleeve-'surrounding Vsaidtube,fsaidsleeve and tube ex-vr tending upward through the bottoms ofthe uppercylinders, said sleeve being rictionally engaged at' itsv upper end withthe said plunger, a pin fixed in said sleeve and passingthrough short'verticalY slots inthe said tube to limit sliding movement of the sleeveon the tube, said sleevel and tube having rows of apertures spacedsubstantially throughout thelength thereof, said apertures being adaptedto be moved into and out of registry with one'anoth'erby slidingmovement of the sleeve on the tube.

In testimony whereof I have atliXed my signature.

RUDOLPH G. G. STAATSOELS.

